August is the latest guess for when Facebook will top the one billion user milestone, according to projections from digital marketing agency iCrossing.

According to iCrossing, strong growth in countries such as India and Brazil will offset the flat growth curve in nations where Facebook is already entrenched, such as the U.S. and U.K.

Further explaining its August projection, iCrossing wrote in a blog post:

Using a process of linear regression on the data from the end of 2008 onward, we expect Facebook to hit 1 billion active users around August 2012. Looking at the data from 2006 through mid-2008, it looks like Facebook was growing at an exponential rate. However, more recent data suggests that it is growing in a linear fashion.